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Table 7 EER of heat pump with cold water delivered at 7 °C and condenser in external air

From: Planned energy-efficient retrofitting of a residential building in Italy

  Frequency [Hz]
T e [°C] 110 90 70 50 30
20 4.78 5.22 5.43 5.34 4.62
25 4.08 4.45 4.63 4.56 3.98
30 3.48 3.8 3.96 3.92 3.45
35 2.97 3.24 3.39 3.36 3.00